Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-30
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 270mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke270 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-30
The AirTAC SAIJ80X270-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 270 mm stroke with a 30 mm adjustment range, creating a 240-270 mm usable travel window for precise end-position tuning. Equipped with a SUS420J2 stainless steel rod and a PT G3/8 port, it generates 2513 N of push force at 0.5 MPa.
The external stopper lets you dial in the retract end at commissioning without swapping the cylinder or adding external stops. Remember the adjuster acts only as a travel stop, not a lock, so it will not hold the load without live air. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting set omits FB, CA, CB, and CR options.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-30 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 270 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×270 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-30 Is Used
End-Stop Tuning
Fine-tune the 240-270 mm travel window during commissioning to dial in the exact retract position without external shims.
Product Changeover
Adjust the rear stopper on the fly when switching the production line to a different product size or stack height.
Assembly Positioning
Set precise end-of-stroke limits for pressing or joining tasks where a fixed 270 mm stroke would overrun the part.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-30 the Right Cylinder?
Choose this 80 mm bore when you need 2513 N of thrust at 0.5 MPa, stepping up from the 50 mm bore which offers 982 N. An adjustable stroke is ideal for machine changeovers where the exact end-stop varies by product size, unlike a fixed-stroke SAI cylinder. For load-holding without live pressure, select a SAIL or BSAI cylinder instead.
When replacing an ISO 15552 cylinder, match the 80 mm bore, 270 mm stroke, 30 mm adjustment, PT G3/8 port, and standard mounting interface. Because the 270 mm stroke exceeds 300 mm is false here, but for any stroke over 300 mm, always use an external guide to support the 25 mm rod and prevent side-load damage.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ80 Adjustable Cylinder SAIJ80AX270-30 FAQ
At a 0.5 MPa operating pressure, the 80 mm bore provides 2513 N of push force and 2268 N of pull force. At 0.7 MPa, the push force increases to 3518 N.
The rear adjuster screw lets you shorten the effective travel from the 270 mm nominal stroke down to 240 mm. This creates a 240-270 mm usable window, allowing you to set the exact end position without changing the cylinder.
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